Polly first appears as a pickpocket executing the sophisticated theft of the Blue Carbuncle gem in the "Blue Ruby" segment, an act which sparks the investigation and points suspicion towards Professor Moriarty as the mastermind. Later, in the "Treasure at the Bottom of the Ocean" segment, Polly is identified as the daughter of a detective restaurant owner. Her involvement in this segment contributes to confronting Moriarty's escalated criminal ambitions, specifically his theft of a naval submarine intended for objectives beyond the initial gem heist. Polly's documented appearances and narrative roles are confined solely to these functions within these two segments of the film. No further background, character development, personal history, personality traits, design, relationships, or appearances in other media are established.